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| Mirrors > Home > ILE Home > Th. List > enrer | GIF version | ||
| Description: The equivalence relation for signed reals is an equivalence relation. Proposition 9-4.1 of [Gleason] p. 126. (Contributed by NM, 3-Sep-1995.) (Revised by Mario Carneiro, 6-Jul-2015.) |
| Ref | Expression |
|---|---|
| enrer | ⊢ ~R Er (P × P) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-enr 8087 | . 2 ⊢ ~R = {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ (P × P) ∧ 𝑦 ∈ (P × P)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = 〈𝑧, 𝑤〉 ∧ 𝑦 = 〈𝑣, 𝑢〉) ∧ (𝑧 +P 𝑢) = (𝑤 +P 𝑣)))} | |
| 2 | addcomprg 7939 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) = (𝑦 +P 𝑥)) | |
| 3 | addclpr 7898 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) ∈ P) | |
| 4 | addassprg 7940 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) +P 𝑧) = (𝑥 +P (𝑦 +P 𝑧))) | |
| 5 | addcanprg 7977 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) = (𝑥 +P 𝑧) → 𝑦 = 𝑧)) | |
| 6 | 1, 2, 3, 4, 5 | ecopoverg 6904 | 1 ⊢ ~R Er (P × P) |
| Colors of variables: wff set class |
| Syntax hints: × cxp 4770 Er wer 6798 Pcnp 7652 +P cpp 7654 ~R cer 7657 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 |
| This theorem depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-eprel 4432 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-recs 6570 df-irdg 6635 df-1o 6681 df-2o 6682 df-oadd 6685 df-omul 6686 df-er 6801 df-ec 6803 df-qs 6807 df-ni 7665 df-pli 7666 df-mi 7667 df-lti 7668 df-plpq 7705 df-mpq 7706 df-enq 7708 df-nqqs 7709 df-plqqs 7710 df-mqqs 7711 df-1nqqs 7712 df-rq 7713 df-ltnqqs 7714 df-enq0 7785 df-nq0 7786 df-0nq0 7787 df-plq0 7788 df-mq0 7789 df-inp 7827 df-iplp 7829 df-enr 8087 |
| This theorem is referenced by: enreceq 8097 prsrlem1 8103 addsrmo 8104 mulsrmo 8105 ltsrprg 8108 gt0srpr 8109 0nsr 8110 axcnex 8220 |
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